Expansys U.K. is expecting the ATIV S due on December 13th at a price of £449.99. You can find the Samsung ATIV S Expansys listing here. Additionally, it is our understanding that the HTC 8S will become available through Expansys U.K. on December 5th for £239.99. The HTC 8S Expansys listing can be found here.
Each phone can be pre-ordered and hopefully the shipping dates will hold true. Just keep in mind we've seen a lot of movement in availability dates for Windows Phone 8 devices and these dates are subject to change.